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Illinois

$91+ Cheap flights from South Dakota to Illinois

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/10. Fares are subject to change and may not be available on all flights or dates of travel.
FSD — ORD
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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Cheap flight deals from South Dakota to Illinois

Keep the following information in mind while searching for South Dakota to Illinois flight deals. Data was last updated September 15, 2025.

Round-trip from

$148
(Priceline)

One-way from

$91
(Kiwi.com)

Popular in

March

Cheapest in

January

Average price

$334

Good round-trip deal

$295 or less

Good one-way deal

$192 or less
From South Dakota to Illinois
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One-way flight from South Dakota to Illinois
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Highest demand for flights based on searches. 6% potential increase in price ($21 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from South Dakota to Illinois.
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Price to beat on a one-way flight from South Dakota to Illinois.
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Find flight deals from South Dakota to Illinois

Cheapest flights from South Dakota to Illinois
Explore the most affordable flight options available from South Dakota to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2025.

This Priceline deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/72:32 pmFSD - ORD
1 stop9h 43mFrontier
Sun 11/96:00 amORD - FSD
1 stop7h 38mFrontier
Deal found 9/12$148
This Frontier deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/107:28 pmFSD - ORD
1 stop5h 31mFrontier
Sun 10/126:50 amORD - FSD
1 stop6h 48mFrontier
Deal found 9/15$158
This Priceline deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/72:32 pmFSD - ORD
1 stop9h 43mFrontier
Mon 11/106:00 amORD - FSD
1 stop7h 47mFrontier
Deal found 9/13$167
This American Airlines deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/77:16 pmFSD - ORD
Nonstop1h 58mAmerican Airlines
Sat 11/811:11 amORD - FSD
Nonstop2h 02mAmerican Airlines
Deal found 9/14$189
This United Airlines deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/218:00 amFSD - ORD
Nonstop1h 51mUnited Airlines
Tue 10/288:00 pmORD - FSD
Nonstop1h 46mUnited Airlines
Deal found 9/14$191
This United Airlines deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/161:44 pmRAP - ORD
Nonstop2h 21mUnited Airlines
Sun 10/198:45 amORD - RAP
Nonstop2h 28mUnited Airlines
Deal found 9/13$209
This United Airlines deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/258:00 amFSD - ORD
Nonstop1h 53mUnited Airlines
Sat 11/298:00 pmORD - FSD
Nonstop1h 46mUnited Airlines
Deal found 9/14$211
This Delta deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/3010:48 amFSD - ORD
1 stop5h 59mDelta
Sat 10/46:15 amORD - FSD
1 stop3h 52mDelta
Deal found 9/15$219
This Frontier deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/32:54 pmFSD - ORD
1 stop9h 05mFrontier
Sun 10/55:35 amORD - FSD
1 stop8h 34mFrontier
Deal found 9/14$220
This Kiwi.com deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/62:54 pmFSD - ORD
1 stop9h 05mFrontier
Wed 10/85:28 pmORD - FSD
2 stops20h 56mFrontier
Deal found 9/13$223
This American Airlines deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/224:58 pmRAP - ORD
1 stop5h 44mAmerican Airlines
Wed 10/295:00 amORD - RAP
1 stop7h 36mAmerican Airlines
Deal found 9/14$229
This United Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/305:50 pmRAP - ORD
1 stop5h 09mUnited Airlines
Sat 10/48:45 amORD - RAP
Nonstop2h 28mUnited Airlines
Deal found 9/15$239

Cheapflights Fare Finder

 
Customize your flight search to find flights from South Dakota to Illinois that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 15, 2025.
Use the filters below to find and compare flights from South Dakota to Illinois that are best for you.

Fly from

South Dakota

Fly to

Illinois

Route

Depart

Return

Price

Sioux FallsChicago

FSD - ORD

FSDORD

Sioux Falls Joe Foss Field

Fri 11/7

2:32 pm-12:15 am

1 stop9h 43m

Chicago O'Hare Intl

Sun 11/9

6:00 am-1:38 pm

1 stop7h 38m

$148

Sioux FallsChicago

FSD - ORD

FSDORD

Sioux Falls Joe Foss Field

Sat 12/6

8:00 am-9:53 am

Nonstop1h 53m

Chicago O'Hare Intl

Sat 12/13

8:04 pm-9:51 pm

Nonstop1h 47m

$189

Sioux FallsChicago

FSD - ORD

FSDORD

Sioux Falls Joe Foss Field

Fri 1/30

6:04 pm-7:50 pm

Nonstop1h 46m

Chicago O'Hare Intl

Sun 2/1

9:40 am-11:35 am

Nonstop1h 55m

$189

Sioux FallsChicago

FSD - MDW

FSDMDW

Sioux Falls Joe Foss Field

Wed 3/4

5:15 am-8:54 am

1 stop3h 39m

Chicago Midway

Sat 3/7

6:45 pm-10:58 pm

1 stop4h 13m

$209

Rapid CityChicago

RAP - ORD

RAPORD

Rapid City

Sat 10/18

1:44 pm-5:05 pm

Nonstop2h 21m

Chicago O'Hare Intl

Tue 10/21

8:45 am-10:13 am

Nonstop2h 28m

$209

Sioux FallsChicago

FSD - ORD

FSDORD

Sioux Falls Joe Foss Field

Sat 2/28

1:20 pm-4:48 pm

1 stop3h 28m

Chicago O'Hare Intl

Wed 3/4

6:00 am-12:35 pm

1 stop6h 35m

$209

Rapid CityChicago

RAP - ORD

RAPORD

Rapid City

Thu 10/16

1:44 pm-5:05 pm

Nonstop2h 21m

Chicago O'Hare Intl

Sun 10/19

5:01 am-9:10 am

1 stop5h 09m

$219

Sioux FallsChicago

FSD - ORD

FSDORD

Sioux Falls Joe Foss Field

Tue 9/30

10:48 am-4:47 pm

1 stop5h 59m

Chicago O'Hare Intl

Sat 10/4

6:15 am-10:07 am

1 stop3h 52m

$219

Sioux FallsChicago

FSD - ORD

FSDORD

Sioux Falls Joe Foss Field

Fri 10/3

2:54 pm-11:59 pm

1 stop9h 05m

Chicago O'Hare Intl

Sun 10/5

5:35 am-2:09 pm

1 stop8h 34m

$220

Sioux FallsChicago

FSD - ORD

FSDORD

Sioux Falls Joe Foss Field

Mon 10/6

2:54 pm-11:59 pm

1 stop9h 05m

Chicago O'Hare Intl

Wed 10/8

5:28 pm-2:24 pm

2 stops20h 56m

$223

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 60 results
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Best time to book a flight from South Dakota to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from South Dakota with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from South Dakota to Illinois

What is the cheapest month to book a flight from South Dakota to Illinois?

Currently, August is the cheapest month in which you can book a flight from South Dakota to Illinois (average of $245). Flying from South Dakota to Illinois in March is currently the most expensive (average of $321). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from SD to IL?

Find hourly flight availability from South Dakota to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 15, 2025.

When flying from South Dakota to Illinois, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from South Dakota to Illinois

Explore weekly flight availability from South Dakota to Illinois. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated September 15, 2025.

The most flights from USSD to USIL are scheduled on a Monday (18 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (14 on average).

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated September 15, 2025.
Read through reviews of airlines operating flights from South Dakota to Illinois, such as Delta, United Airlines, and American Airlines. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,954 reviews

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,954 reviews
Delta
8.0
Very good
7,954 reviews

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,929 reviews
Delta
8.0
Very good
7,954 reviews

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,954 reviews

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

Find useful and relevant information for your journey from South Dakota to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from South Dakota to Illinois?

    Airlines like Frontier, United Airlines, and American Airlines fly from South Dakota to Illinois in about 1h 46m. The time it takes to get you to your destination can typically vary by up to 7h 57m. Airlines will cover a distance of 461 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • Can I find deals for flights from South Dakota to Illinois that include hotel bookings?

    Yes. In addition to deals on South Dakota to Illinois flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from South Dakota to Illinois?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from South Dakota to Illinois.

  • Can I find deals for business class flights from South Dakota to Illinois?

    Yes. Cheapflights offers flight deals from South Dakota to Illinois by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from South Dakota to Illinois?

    Currently, August is the cheapest month in which you can book a flight from South Dakota to Illinois (average of $245). Flying from South Dakota to Illinois in March is currently the most expensive (average of $321). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for South Dakota to Illinois

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Top 4 airlines flying from South Dakota to Illinois

Discover the top 4 airlines that operate flights from South Dakota to Illinois. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
Denver Air ConnectionCheapest$172Average$192FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$189Average$234FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$189Average$325FlexibilityNo cancel feeOn-time69%
DeltaCheapest$208Average$311FlexibilityNo cancel feeOn-timeN/A

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